tail -f

[Blaine Robertson]

Can someone please tell me how 'tail -f' works?.  Obviously, it does not
do a busy loop while doing a stat on the file.  I know that it has got
to be blocked, waiting for the length to change, but how does it get
notified of a change?  Thanks in advance for any responses.

-- 
Blaine Robertson
Federal Express, Memphis, TN
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